I already saw something similar here, so may be a duplicate. I was about to suggest to shift all scopes to picture-in-picture mode (except of hunting one maybe), but then I saw AUG A1, it has very small zoom, but it's picture-in-picture, and it looks really nice. I imagine if acogs and pso were the same way, ofc if it's not huge perfomance drop, but aug a1 works fine as for me. So yea, it's a really nice feature, and AUG A1 proves it. But don't believe me, just load the game, spawn some weapon with PSO and AUR A1 and check it yourself, it's a small detail, but as for me it affects on general game atmosphere a lot.